Shahid Kapoor, Priyanka Chopra to pair up

The former couple are working together "constantly" on the film, Mumbai Mirror reports.

A source told the paper: "When Kunal Kohli came up with the idea of depicting four different facets of love based in four cities with Shahid and Priyanka, the first step was to make each couple look different."

They added that the pair will have to work on their speech and their body language to reflect where they are in the film.

Chopra has played multiple roles in several films including What's Your Rashee? and Love Story 2050.